Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 193, Issue -, Pages 67-74Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2016.04.016
Keywords
N-doped carbon quantum dots; P25; Photocatalyst; NO photo-oxidation; Methylene blue degradation
Funding
- European Research Council [321315]
- research project SolarConcept [PTDC/EQU-EQU/120064/2010]
- European Union
- Portuguese Government through Portuguese Foundation for Science and Technology (FCT) in the framework of QREN Initiative
- European Regional Development Fund through Operational Program for Competitiveness Factors
- national funds through FCT/MEC [FCT UID/CTM/50011/2013]
- FEDER [PT2020]
- Portuguese Foundation for Science and Technology (FCT) [SFRH/BD/79974/2011]
- FCT [SFRH/BPD/66407/2009]
- Fundação para a Ciência e a Tecnologia [SFRH/BPD/66407/2009, PTDC/EQU-EQU/120064/2010, SFRH/BD/79974/2011] Funding Source: FCT
- European Research Council (ERC) [321315] Funding Source: European Research Council (ERC)
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A new composite of TiO2 (P25) and N-doped carbon quantum dots (P25/NCQD) was prepared by a hydrothermal method and was used for the first time as catalyst of the photo-oxidation of NO under UV and visible light irradiation. P25/NCQD composite exhibited a NO conversion (27.0%) more than two times higher of that observed for P25 (10%) under visible light and the selectivity of the process was increased from 37.4% to 49.3%. The composite also showed better photocatalytic performance than P25 in the UV region with increases of 36.3% on NO conversion and 16.8% on selectivity. Moreover, compared with P25, the photodegradation ratio of methylene blue was enhanced from 68% to 91% after UV irradiation for 1 h. NCQD played a crucial role on the photocatalytic activity improvement of P25/NCQD, increasing visible light absorption, slowing the recombination and improving the charge transfer. (C) 2016 The Authors. Published by Elsevier B.V.
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